Hose-pipe coupling.



H. FORSMAN. 'HOSE PIPE COUPLING.

APPLICATION FILED'MAR. 1'0, 1'915.

$191699 389 Pafientedgmn. 25, 1916.

INI/EIVTOH WITNE ES I y Hermon Forsm n a v A BY ATTORNEYS I hurrah smarts rareur (EFFiQE.

HERMAN FORSMAN, OE FRESNO, CAZIFORNIA;

HOSE-PIPE COUPLING.

To all whom it may concern:

Be it known that I, HERMAN FoRsMAN, a citizen of the United States, and a resident of Fresno, in the county of Fresno and State of California, have invented a new and Improved Hose-Pipe Coupling, of which the following is a full, clear, and exact description.

Among the principal objects which the present mvention has in view are: To provide means for rapidly and securely unitmg hose sections; to provide means for locking said sections in united relation; to provide means for drawing the sections together to prevent leakage thereof; and to provide means for locking the sections in service relation.

Drawinga-Figure 1 is a top side view of a hose coupling constructed and arranged in accordance with the present invention; Fig.

' 2 is a longitudinal section taken on the line 2+-2 in Fig. 1; Fig. 3 is an end view of a female member of a hose coupling; Fig. 4

is a diagrammatic view showing in platted arrangement the different angles of the sections of the groove in the locking nut.

Desor z'72t2'0n.-As seen in the drawings, the coupling embodies a male member 9 and a female member 10. The member 10 has a transverse slot 11 formed therein, the side edges 12 whereof overhang in the manner best shown in Fig. 1 of the drawings. The face or sliding surface 13 of the slot 11 is inclined, as shown best in Fig. 2 of the drawings, forming at one end of said slot a rela- I tively-deep passage, and at the opposite end thereof a relatively shallow passage.

The member 9 has a dovetailed projection 14 extending from the end thereof, said projection corresponding with the slot 11, the surfaces 13 and 15 of the two members 9 and 10 being ground to form a water-tight joint when drawn together. To further insure the tightness ofthe joint, the member 10 is grooved to receive a packing ring 16, as best shown in Fig. 2 of the drawings.

lVhen the members 9 and 10 are connected, the dovetailed projection 14 is'forced tightly upon the packing ring 16. by the manipulation of a cam groove'nut 17. The nut 17 is pivotally mounted in the member 9, and is provided with'a cam slot 18. The slot 18 is preferably cut to form three pitch sec.-

5 tions, as seen best in Fig. 4 of the drawings, 5

Specification of Letters Iatent.

Patented Jan. 25, mile.

Application filed March 10, 1915. Serial No. 13,362.

the slot 18 is provided, while the section indicated by the letter b shows the even pitch, or What may be termed the drawing section, and the letter 0 a level section which serves to lock the nut 17 when said section 0 passes under a pin 19. I

The pin 19 extends from the side of a lug 20 integrally formed with and ofiset from the member 10. The pin 19 is shaped for engagement with the slot 18 of the nut 17.

Operatz'0n.-Having coupling members constructed and equipped in the manner as described, the operation is as follows The members 9 and 10 are brought together in such a manner as to permit the introduction of the dovetailed projection 14 into the slot 11. The pin 19, being in the path of Y the nut 17, holds the surf-ace 15 away from the surface 13 unti said pin enters the slot 18. The sharp-pitched section a secures a rapid lengthwise travel of the nut 17 relative to said pin. When the under surface of the slot 18 begins to bear on the pin l9 a wrench is applied to the wrench head 21 of applied to the nut 17 is'suflicient to com-- press the ring 16 and to force the surfaces 13 and 15 into such engagement as to preclude the possibility of water, gas or steam passing the joint thus formed.

Claims:

1. VA coupling as ing a female member having a transverse slot, the side edges of said slotoverhanging; a male member having a dovetailed projection for cooperating with said slot, said projection being cam-shaped to engage the overhanging edges, for drawing said male and female members intocloser relation; an

abutment. mounted on one of said members adjacent the slot therein; and a screw pivot-' ally mounted on the other member. the thread ofsaid screw operatively' engaging said abutment.

2. A coupling as characterized, comprising a female member having'a transverse slot, the side edges of said slot overhanging; a male member having a dovetailed projection for cooperating with said slot, said projection being cam-shaped to engage the characterized, comprisoverhanging edges, for drawing said male section at the end of the inclined 'portion.

I thereof for holding said abutment in locked relation to said screw. a I v 3. A couplmg as characterized, comprlsmg a female member; a male member, the

former member having a transverse slot the sides whereof are undercut, and the latter member having adovetailed projection the sides whereof correspond with the sides of said slot, the engaged faces of said slot andtsaidflprojection being inclined to the axes of said members; a pin mounted on one of said members and extending through the other of said members; and a screw pivotally mounted on the other member for engaging said pin, to,move said members lengthwise of the inclined faces thereof. 1

4. A coupling as characterized,-comprising a female member; a male member, the

said slot, the engaged facesof said slot and said projection being inclined to the axes of said members; a pin mounted on one of sa1d members and extending through the other of sa1d members; and a screw pivotmounted on the other member for engaging "sa1d pm, to move sa1d members lengthwise of the inclined faces thereof, the thread vof said screw having a sharp entrance section, an evenly-pitched inclined section adjacent said entrance section, and a level section adjacent said inclined section for engaging said pin, for moving said male and female members into engagement with diminishing speed;

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HERMAN FOR'SMAN.

Witnesses Geo. L. FLAGG, J. B. MCLEES. v 

